1138722 has 24 divisors (see below), whose sum is σ = 2468304. Its totient is φ = 350064.

The previous prime is 1138717. The next prime is 1138729. The reversal of 1138722 is 2278311.

It is a junction number, because it is equal to n+sod(n) for n = 1138692 and 1138701.

It is not an unprimeable number, because it can be changed into a prime (1138729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 453 + ... + 1575.

It is an arithmetic number, because the mean of its divisors is an integer number (102846).

2^1138722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1138722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1234152).

1138722 is an abundant number, since it is smaller than the sum of its proper divisors (1329582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1138722 is a wasteful number, since it uses less digits than its factorization.

1138722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154 (or 1141 counting only the distinct ones).

The product of its digits is 672, while the sum is 24.

The square root of 1138722 is about 1067.1091790440. The cubic root of 1138722 is about 104.4253413916.

The spelling of 1138722 in words is "one million, one hundred thirty-eight thousand, seven hundred twenty-two".